Lock



Jan. 13, 1931. A. m: ARMAS Y MANRIQUE-ETAL 1,

LOCK

Filed July 5, 1928 5 Sheets-Sheet 1,

6 a a W E 4 4 $6 Ma "WW am I Jan. 13, 193-1. A. DE ARMAS Y MANRIQUEETAL 1,789,171

LOCK

- Filed July 5. 1928 5 Sheets-Sheet 3 w r a Jan. 13, 1931.

A. DE ARMAS Y MANR'IQUE ET AL LOCK Filed July 5,, 192a 5 Sheets-Sheet 3 Jab. 13, 1931. A. DEIIARMAS Y MANRIQUEETAL LOCK FiledJuly 5, 1928. 5 Sheets-Sheet 5- Patented J an'. 13, 1931 ANTONIO DE ARMAS Y MAnBI'QUE' Ann LooK Application filed July s; 1928. Serial No. 2903. 19.

This invention is directed to an improve ment in locks, particularly the cylinder type, in which provision is made for preventing cutting through the tumblers onthe line of juncture between the casing and barrel for the unauthorized opening of the lock Without the use of the usual key Y In cylinder locks of the conventional type, the tumblers are in sections which, in operative position, prevent the rotation of .the barrel with: respect to the cit-sing, the use of the proper key so moving the tumbler secjuncture between the casing. and berreLv thus permitting the latter to be rotated; It has been demonstratedthat by drilling through the lock in the line of juncture between the barrel and casing and in line with the turnblers, the tumblers may be divided on this line and therebypern it the barrel to -be freely turned for opening the lock without the necessity of using the proper key.

The primary object of the present invention is the provision of means tending .to prevent the cutting or drilling of the tuniblers of the look along the particular line which will free the barrel.

The invention is illustrated in the panying drawings, in which: v I

Figure 1 is a viewin elevation, partly broken out, showing 2iconventional-forin of cylinder lock provided With one form of accommeeii'sfor preventing the drilling of the lock I in line With the tumblers.

Figure2 is a front elevation of the same. Figure 3 is asectionon line 3 -3 of Fig- Figures is a perspective view of thebnrrel of the imp ro'vedlock.

Figure 5 is a front elevation, partly brolrenout,. of a cylinder form of lock provided wlth another vform of meansfor-preventing drill- ,ingof thelock in the line of the tumblers.

of the protecting disk.

Figure is a section of the line l O1O of Figure 9. 5

Figure 11 is a sid elevation of a conventional formof cylinder lock, partly broken out v and showing'the lock provided tvith; an:

7 other type of means for preventingdrilling of the locleiii line With the tumblers.

Figure 12- is a vertical sectional view throughthe same on the line 12-12 of Fig ure 11. i o,

. Figure 13 is a side elevation of the barrel i v used With this typeof lock. tions that their junctures are in line. with the Figure 14; is a perspective view o fthepro- .tecting wedge. i v

Figure 15 is a longitudinal section through the lock, the protecting wedge beingshovvn FRANCISCO GONZALEZ DEL VALLE, or HABANA, CUBA iniplace the key being shown in placefin initially applied position, the line of ev n being on line 1 515 of Figure 12.

Figure 16 is abroken View of the seme githe barrel being turned to operate the lock.

Figure 17 is a broken elevation of the key used in this type of lock. n

F igu-re 1 8 is a front elevation of a'eon- Xelgfblllilal cylinder lock sho iving further modified form of protecting ,ineaiis.

Figure 19 is a longitudinal section on the line 19.'--19 of Figure 18.

Figure 20 is vertical section of the upper section of one of' the turnblersl I Figure 21 is -a per spective vieiv partly broken out, "of't'he saiiie. Z V

Figure 221s gt top plano-f the same, I Figure 23 is a vertical section offjoiie of the lower portions of the tumblers.

F igureQtisatop plan ofthe' same.

'. Figure 25 is a front elevation of a conventional form of cylinder locl g-showing a further modified means of preventing .drillingpf the loclr in the line of the tuniblers.

Figure 26-;is a side The conventional. cylinder lock embodies a casing 1 formed withan opening 2 for the reception of a barrel 3 having a keyWa-y 1 for-the introduction ofa key of a partie ular type. The casing and barrel are formed with transversely ranging bores o which, When the barrelis inlocked relation elevation, partly in. 'VGEUGal SQCtIOD, of-the same.

to the casing, are adapted to be in alignment. In these bores are arranged tumblers including upper sections 6 and lower sections 7.

The respective sections of any one tumbler are designed to differ in length from the similar sections of other tumblers,

so that with the lower ends of thesections- 7 resting on the appropriate abutment inv the keyway 1, the junoturebetween sections of any one tumbler is out of line with the juncture between the sections of other;

tumblers. Thus, the line of juncture be- (lil tween the barrel and casing is bridgedat one or more points by. a solid portion of either the upper or lowersection of a particular tumbler and the barrel cannot be turned to open the lock.

The key, as illustrated for example at 8 in Figure 17, is formed 111 one edge with angular notches 9 of difierent depths and the lower ends of the lower tumbler sections 7 are of conical form to permit the key to be introduced so that each particular lower tumbler section will seat in theprop-' erly formed notch ,in the key. These notches are of such depth that when the key has been introduced, as illustrated for example in Figure 15, therespective tumbler sections are moved against the ten sion of springs 10 bearing upon the upper tumbler sections, so that the juncture between the upper and lower sections or all tumblers is directly aligned with the juncture between the casing and barrel.

Therefore, the barrel is free to turn by a turning operation of the'key and the lock may be opened. V 7

With the line of juncture between the upper andlower sections of any'tumblcr out of line with the junction between the casing and barrel, the barrel cannot be turned, but it is evident that if the lock is drilled on the line or juncture between the barrel and casing, that'is,on theline 11, with suclrline or cut in the plane of the tumblers, the tumblers will be divided and the barrel will be free to be turned to open the lock. The present invention isdesigned with a View to "preventing a drill from dividing the tumblers and involves several different types of constructions tending to this important result.

i In the form shown in Figures 1 to 41, the face of the lock, throughout an area'preferably extending from the edge of the'casing to the barrel, is formed with vertically ranging channels 12 which are 'V-shaped in cross section. These channels are parallel with their adjacent vertical walls meeting in the plane or the face of the lock in-a ridge 13 defining a sharp edge extending throughout the full range of the channels.

The channels are so disposed that the maximum width of the channeled area is proper key.

greater than that of the tumblers of the lock and the ridge 13 is in line with'the center'line of the tumblers, the depressions of the respective channels being beyond the plane of the tumblers in each direction, as

will be plain from Figurefd of the drawin In this form of the lock; any attempt drill through the tumblers will, in order to reach the tumblers, require that the drill be introducedexactly on the ridge 13, and as this ridge is in the form of a sharpened edge from which the walls of the depressions diverge, it is apparent that the drill will be directed to one side or the other of the line of tumblers and hence will not cut the tumblers" to free the barrel. 7

In [Figures 5 to lo'inclusive is shown an other form of the invention, the conventional parts of the-lock hereinbefore referred to being given the same reference characters in these figures as in the preceding figures.

In this form of the invention, the front walls 14 and 15 of the casing and barrel are together formed with a circular recess 16 in which is loosely placed a metallic disk 17. The disk is of hardened metal and is of somewhat less diameter and thickness than the corresponding dimensions of the recess 16, so that the disk is substantially free in 1 the recess.

The barrel is formed with an annular groove 18 forming a continuation of that portion of the recess 16 formed in the barrel, so that the barrel may be rotated without disturbing the disk. The disk 17, which may be of hardened metal, if desired, is formed in that face next the face of the lock with a depression 19'of'conica'l formation and said disk is arranged in the longitudinal line of the tumblers of the lock.

Inthis form of the inventionpit is apparent that an attempt to drill through the lock to-cut the tumblers, as previously referred to, will be'intercepted'by the disk, and I the disk is free to rotate in its recess, it

will simply move with the turning of the drill andthe drill will not penetrate; The key 8101' this type of lock is provided with a cut-out portion 20 in the'e'd 'e opposite the notches 9, which cut-out portion'registers with the-channel 18 in the barrel when the key is applied, thus providing a means in the'keyto receive the edge of the disk 17 when the barrel is-turned after use of the the barrel being continued in the form of an annular groove 22 in the barrel. A wedge .key 23 is driven into the opening 21, the

opening and key being of such relative form that the key is held securely in the opening in the casing, the lower edge of the key rida ing in the annular groove 22 in the barrel to avoid interference with the rotation ofthe barrel following the use of the proper key.

The wedge key 23 is of tempered steel and the opening to receive the wedge key is preferably arranged between the first and second tumblers of the look, as more clearly shown in Figure 15. The wedge key thus bridges the line of juncture between the eas- F ing and barrel and any attempt to drill through the tumblers will be intercepted by the key, so that the tumblers in rear of the key with respect to the face of the lock cannot be reached by the drill. The operating key 8 is formed in the edge-opposite the notches 9 with a cut-out portion 24 adapted to register with the annulargroove 22 in the barrel when the key is in applied position, so that the barrel with the applied key may be turned, without interference from the wedge key 2-3.

A further form of the invention is illus-- trated in Figures 18 to 24 inclusive, the parts in each of these figures which are similarto the conventional parts shown in the preferred form, bearing reference characters in agreement with such preferred form.

In this form, the respective tumbler sections 6 and 7 are constructed of tempered steel and provided with a metallic cover 25 to prevent their oxidation. The tumbler sections proper are formed with annular channels 26. Any attempt to drill through the tumblers will be prevented for the drill can not cut through the tumblers proper incident to their comparative freedom of rotation and, while the drill may penetrate the cover of the particular tumbler encountered, yet the freedom of the tumbler sections and their character will prevent cutting through such sections. In the event the rotation of the drill afterperforating the cover tends to produce such movement of the tumbler section as might cause such section to move upwardly, it is apparent that when the drill encounters the channel 26, the

rising tendency of the tumbler section will be thereafter prevented. a e

A further modification of the invention is illustrated inFigures 23 and 26, the conventional parts of the, lock being indicated under the same reference numerals as in the preferred form.

In this form, the front wall of the casing 1 and barrel 3 are each formed with radial openings 27 and 28 respectively adapted to align when the barrel is in locked position in the casing. The tumblers 29 and 30 seat in these respective openings, these tumblers beingof hardened steel and while of such lengththat they do not bridge. the line of juncture between the casing and barrel, are nevertheless sufliciently close to such line as to intercept a drill operating on such line.

If desired, the. openings or that portion of each between the proximate ends of the respective tumblers may contain a plastic filler 31, as waX, lacquer. or the like, which will prevent the entrance of air or moisture tending to the oxidation of the tumblers 29 and 30. V

In this form, the drill can not penetrate either tumbler 29 or 30 owing both to the character of such tumblers and their free the invention serves to prevent the drilling of the lock in a way to cut the tumbler sections in order to free the barrel with re spect to the casing; thus the lock is proof against such unauthorized opening and in some instances, particularly in the forms shown in Figures 5 to 10 and 11 to 16, the authorized key'contains an additional construction over that-necessary to operate the lock proper, thus further safeguarding the lock against unauthorized tampering;

WVhat we claim to be new is:

1. A ipin tumbler lock having the face thereof in line with the tumblers formed with spaced channels and an intermediate j ridge having a sharp free edge.

2. A pin tumbler lock having the face thereof in line with the tumblers formed with spaced channels and an intermediate ridge having a sharp free edge, the base of the ridge being at least coextensive with and in alignment with the pin tumblers.

In testimony whereof we aflix our signatures at I-Iabana, Cuba, this fourth of May,

1928. Y V ANTONIO on ARMAS Y MANRIQUE. FRANCISCO GONZALEZ Dun VALLE. 

